Following Boleslaw's death, in accordance with his will, Poland is split into five main provinces, one for each of his sons, with the senior holding also the "royal" province between Great and Little Poland. Beginning of regional disintegration which continues until 1320.
Konrad of Mazovia[?] asks Teutonic Knights, recently expelled from Hungary by Andrew II, to settle in Poland and gives them land in northern Mazovia, in addition to any territory they can wrest from the pagan Prussians and Lithuanians. The christianization of Prussia begins
The Teutonic Knights drive out the Brandenburgians who captured Gdansk, but hold the city for themselves. Wladyslaw the Elbow High , caught up with the situation in Little Poland, particularly the conspiracy led by Albert, the Cracow mayor, cannot intervene.
Second Treaty of Thorn: the Teutonic Order cedes western (henceforth Royal) Prussia to Poland; eastern (later Ducal) Prussia remains under control of the Order, as a Polish fief.
The Third Partition of Poland: Russia gains Curonia[?], Lithuania, western Belarus and western Volhynia, while Prussia receives the land to the north and west of Warsaw, and Austria the land to the south and east of the city.